Finding the Fourth Proportional to 1,054.38, 1,454.52 and 612.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.38 : 1,454.52 = 612.12 : x
2. Step 2: Convert to fraction form
   1,054.38/1,454.52 = 612.12/x
3. Step 3: Cross multiply
   1,054.38x = 1,454.52 × 612.12
4. Step 4: Simplify right side
   1,054.38x = 890,340.78
5. Step 5: Solve for x
   x = 890,340.78/1,054.38
6. Step 6: Final answer
   x = 844.42